A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

No matter how little or how much you use me, you change me every month. What am I?

I can write cow in 13 letters.

Can You?

A convention is held where all the big logicians are summoned. The master places a band on everyone's forehead. Now all of them can see others bands but can't see his own. Then they are told that there are different colours of bands. All the logicians sit in circle and they are further explained that a bell will ring at regular intervals. The moment when a logician knew the colour of band on his forehead, he will leave at the next bell. If anyone leaves at the wrong bell, he will be disqualified.

The master assures the logicians that the puzzle will not be impossible for anyone of them. How will the logicians manage ?

When 99 is considered higher than 100?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

A bomb exploded in a room full of married couples and no one died. How?

I know a number which is spelt in alphabetical order.
Do you?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?